What is the difference between mktime and strtotime

This means that at a particular point in time, this function will return the same value in the US, Europe, India, Japan, So converting a UTC time like 'T' with strtotime actually yields a wrong result.

I came up with this function to assist in parsing this peculiar format. This affects the "zero date" " " as well as dates outside the traditional 32 date range. I do not know if we can tweak this PHP behavior, anyone know? If you want the timestamp of the start of the ISO Week i. This function parses the string as a whole, then applies the intervals by size year, month, Adding a note to an already long page: Try to be as specific as you can with the string you pass in. Depending on the day of the month, you may get a different response.

If it's a leap year, you'll get March on the 30th or 31st of the month. The same thing will happen on the 31st of any month when you pass in the name of any month with less than 31 days. This happens because the strtotime function will fill in missing parts from the current day. Assuming today is July 31, the timestamp returned by strtotime 'February' will ultimately be seen as February 31 non-existant obviously , which then is interpreted as March 3, thus giving a month name of March.

Interestingly, adding the year or the day will give you back the expected month. I appreciate all the DateTime responses but I do not get an accurate system date from DateTime only from strtotime in linux. NOTE: strtotime returns different values when the Week day does not match the date. Little bit unexpected behaviour for me.

Small integers treats like time. Strtotime can be used to loop through date range. Here's a hack to make this work for MS SQL's datetime junk, since strtotime has issues with fractional seconds.

Ask Question. Asked 11 years, 9 months ago. Active 11 years, 9 months ago. Viewed 10k times. I'm trying to convert to February, But, I keep getting December, I've tried using mktime, strtotime, and some combination of the two, but still haven't been able to do it This is what I tried most recently Improve this question. Add a comment. The mktime function, as the name implies make time is used to get a certain time in timestamp format. Usually, we read the arguments from left to right. Well, for the mktime function, in order to easy to understand the arguments, we can read it from left to right for the time: H: i: s and right to left for the date: Y-d-m.

Argument Explanation:. The above three functions will produce the same timestamp, however, since PHP version 5. Examples of mktime function:. The format is:. For Example:. Consider the following example:. In the example above, the strtotime function generates timestamp of: 1 day after February 28, , that is March 01, The example above shows that the referenced date is The string argument can be grouped into two form: Date Time format and relative format.

Just a small thing to think about if you are only trying to pull the month out using mktime and date. Make sure you place a 1 into day field. Otherwise you will get incorrect dates when a month is followed by a month with less days when the day of the current month is higher then the max day of the month you are trying to find..

Such as today being Jan 30th and trying to find the month Feb. Be careful passing zeros into mktime, in most cases a zero will count as the previous unit of time. The documentation explains this yet most of the comments here still use zeroes. For example, if you pass the year into mktime, with zeroes for everything else, the outcome is probably not what you are looking for.

Maybe not as obvious of a purpose as zeroes to other programmers, though. Please note, mktime requires an integer value, if you use date "H" , date "i" , date "s" as a value, which is actually have a leading zero, you may get "A non well formed numeric value encountered" notice. Please mind function is timezone dependent. Timezone independent funciton is gmmktime. I was using the following to get a list of month names. Under PHP 5. Same date twice in calendar The following function moves all the parameters in order of most significant biggest to least significant smallest order.

Year is bigger than month. Month is bigger than day. Day bigger than hours Much less confusing than mktime order. The maximum possible date accepted by mktime and gmmktime is dependent on the current location time zone.

If the date is , the following yeilds March as a previous month. Not what you wanted.